My 05 LGT is tuned for 93 octane(by Ron at RS), in Ia the best I can get is 91 octane. Do I need to retune? thanks
When i bought my AP and contacted Cobb about this issue, they told me it would be safer to tune it to 91. That way you can run both 91 and 93 and the ecu would be fine. So you might have some issues if you have a 93 tune and run 91 which is lower than 93. This is what i was told. GL